hi,
i am working on a design that i want to make available to other shopbotters.I am working in europe and am familiar with standard sizes of sheetmaterial here.

more specific here we have 18mm plywood and 15 mm,sheetsize 1220mmx2440mm, and 1250mmx2500mm.regular available in every store.
What are standard sizes in the usa and uk?
like 3/4 inch sheetmaterial is that 19.05 mm?

thanks
dingenis